tools/virtio/linux/kernel.h

   1 #ifndef KERNEL_H
   2 #define KERNEL_H
   3 #include <stdbool.h>
   4 #include <stdlib.h>
   5 #include <stddef.h>
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <assert.h>
   9 #include <stdarg.h>
  10
  11 #include <linux/types.h>
  12 #include <linux/printk.h>
  13 #include <linux/bug.h>
  14 #include <errno.h>
  15 #include <unistd.h>
  16 #include <asm/barrier.h>
  17
  18 #define CONFIG_SMP
  19
  20 #define PAGE_SIZE getpagesize()
  21 #define PAGE_MASK (~(PAGE_SIZE-1))
  22
  23 typedef unsigned long long dma_addr_t;
  24 typedef size_t __kernel_size_t;
  25
  26 struct page {
  27         unsigned long long dummy;
  28 };
  29
  30 /* Physical == Virtual */
  31 #define virt_to_phys(p) ((unsigned long)p)
  32 #define phys_to_virt(a) ((void *)(unsigned long)(a))
  33 /* Page address: Virtual / 4K */
  34 #define page_to_phys(p) ((dma_addr_t)(unsigned long)(p))
  35 #define virt_to_page(p) ((struct page *)((unsigned long)p & PAGE_MASK))
  36
  37 #define offset_in_page(p) (((unsigned long)p) % PAGE_SIZE)
  38
  39 #define __printf(a,b) __attribute__((format(printf,a,b)))
  40
  41 typedef enum {
  42         GFP_KERNEL,
  43         GFP_ATOMIC,
  44         __GFP_HIGHMEM,
  45         __GFP_HIGH
  46 } gfp_t;
  47
  48 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
  49
  50 extern void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end;
  51 static inline void *kmalloc(size_t s, gfp_t gfp)
  52 {
  53         if (__kmalloc_fake)
  54                 return __kmalloc_fake;
  55         return malloc(s);
  56 }
  57
  58 static inline void kfree(void *p)
  59 {
  60         if (p >= __kfree_ignore_start && p < __kfree_ignore_end)
  61                 return;
  62         free(p);
  63 }
  64
  65 static inline void *krealloc(void *p, size_t s, gfp_t gfp)
  66 {
  67         return realloc(p, s);
  68 }
  69
  70
  71 static inline unsigned long __get_free_page(gfp_t gfp)
  72 {
  73         void *p;
  74
  75         posix_memalign(&p, PAGE_SIZE, PAGE_SIZE);
  76         return (unsigned long)p;
  77 }
  78
  79 static inline void free_page(unsigned long addr)
  80 {
  81         free((void *)addr);
  82 }
  83
  84 #define container_of(ptr, type, member) ({                      \
  85         const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
  86         (type *)( (char *)__mptr - offsetof(type,member) );})
  87
  88 #define uninitialized_var(x) x = x
  89
  90 # ifndef likely
  91 #  define likely(x)     (__builtin_expect(!!(x), 1))
  92 # endif
  93 # ifndef unlikely
  94 #  define unlikely(x)   (__builtin_expect(!!(x), 0))
  95 # endif
  96
  97 #define pr_err(format, ...) fprintf (stderr, format, ## __VA_ARGS__)
  98 #ifdef DEBUG
  99 #define pr_debug(format, ...) fprintf (stderr, format, ## __VA_ARGS__)
 100 #else
 101 #define pr_debug(format, ...) do {} while (0)
 102 #endif
 103 #define dev_err(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
 104 #define dev_warn(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
 105
 106 #define min(x, y) ({                            \
 107         typeof(x) _min1 = (x);                  \
 108         typeof(y) _min2 = (y);                  \
 109         (void) (&_min1 == &_min2);              \
 110         _min1 < _min2 ? _min1 : _min2; })
 111
 112 #endif /* KERNEL_H */